ATE243331T1 - METHOD FOR IDENTIFYING A DELAYED PROCESS WITH COMPENSATION AND DEVICE FOR REGULATING SUCH A PROCESS - Google Patents

METHOD FOR IDENTIFYING A DELAYED PROCESS WITH COMPENSATION AND DEVICE FOR REGULATING SUCH A PROCESS

Info

Publication number
ATE243331T1
ATE243331T1 AT99121797T AT99121797T ATE243331T1 AT E243331 T1 ATE243331 T1 AT E243331T1 AT 99121797 T AT99121797 T AT 99121797T AT 99121797 T AT99121797 T AT 99121797T AT E243331 T1 ATE243331 T1 AT E243331T1
Authority
AT
Austria
Prior art keywords
model
steady state
control
control variable
turning point
Prior art date
Application number
AT99121797T
Other languages
German (de)
Inventor
Bernd-Markus Pfeiffer
Original Assignee
Siemens Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of ATE243331T1 publication Critical patent/ATE243331T1/en

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B17/00—Systems involving the use of models or simulators of said systems
    • G05B17/02—Systems involving the use of models or simulators of said systems electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92066—Time, e.g. start, termination, duration or interruption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/9298—Start-up, shut-down or parameter setting phase; Emergency shut-down; Material change; Test or laboratory equipment or studies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Artificial Intelligence (AREA)
  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • Feedback Control In General (AREA)
  • Electrotherapy Devices (AREA)
  • Control Of Heat Treatment Processes (AREA)

Abstract

Commencing from a first steady state, the control variable (y) of the first controller (33) is set to a first constant value (80%) and that of the second (34) is cut off. Following determination of a turning point in the curve of control variable (x), a first IT1 model of the control processing system (32) is identified. The process is controlled as a function of the first IT1 model, at least close to a second steady state (170 degrees C) differing from the first. From the tangent (wh) at the first turning point, the value of the variable (y) and the control variable (x) from the first and second steady states, a VZ2 model is identified. Commencing from a first steady state, the control variable (y) of the first controller (33) is set to a first constant value (80%) and that of the second (34) is cut off. Following determination of a turning point in the curve of control variable (x), a first IT1 model of the control processing system (32) is identified. The process is controlled as a function of the first IT1 model, at least close to a second steady state (170 degrees C) differing from the first. From the tangent (wh) at the first turning point, the value of the variable (y) and the control variable (x) from the first and second steady states, a VZ2 model is identified. The VZ2 model describes the kinetics of the process (32) and the amplification coefficient for the first controller (33). From the second steady state on, the first controller (33) is switched off and the control variable of the second (34) is set to a second constant value (20%). Once a second turning point in the curve of the control magnitude (x) has been determined, an amplification coefficient for the second actuator (34) is determined, in accordance with the formula: kik = (dxwk/dt + Kih . yinfinity)/(YLLMTUM). In this equation : dxwk/dt is the gradient of the tangent at the second turning point and (kik) is the process amplification coefficient of the identified first IT1 model. yinfinity is the value of the magnitude (y) in the second steady state. YLLMTUM is the second constant value of the control variable. An Independent claim is included for equipment based on the method, used e.g. to control a plastic extruder. There are controllers heating, and others cooling, operating at different intensities. Preferred features: Salient features include the 170 degrees C typical working point of a steady state, following heating. The control process is further elaborated mathematically, including formulae in the form of approximations, polynomial series expansions, up to fifth order with respect to the process path time constants ratio. Quantified empirical constants are also provided.
AT99121797T 1998-11-10 1999-11-03 METHOD FOR IDENTIFYING A DELAYED PROCESS WITH COMPENSATION AND DEVICE FOR REGULATING SUCH A PROCESS ATE243331T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19851826A DE19851826A1 (en) 1998-11-10 1998-11-10 Process for identifying a delayed process with compensation and device for regulating such a process

Publications (1)

Publication Number Publication Date
ATE243331T1 true ATE243331T1 (en) 2003-07-15

Family

ID=7887320

Family Applications (1)

Application Number Title Priority Date Filing Date
AT99121797T ATE243331T1 (en) 1998-11-10 1999-11-03 METHOD FOR IDENTIFYING A DELAYED PROCESS WITH COMPENSATION AND DEVICE FOR REGULATING SUCH A PROCESS

Country Status (4)

Country Link
EP (1) EP1001320B1 (en)
AT (1) ATE243331T1 (en)
DE (2) DE19851826A1 (en)
ES (1) ES2202990T3 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10060125A1 (en) * 2000-12-04 2002-06-13 Siemens Ag Temperature rise control process and circuit for processing system uses subtraction circuit, linear PID regulator and control circuit
FR2821175A1 (en) * 2001-02-19 2002-08-23 Solvay METHOD FOR REGULATING A PROPERTY OF A PRODUCT RESULTING FROM A CHEMICAL TRANSFORMATION
US7103445B2 (en) 2002-11-27 2006-09-05 Kimberly-Clark Worldwide, Inc. System and method for controlling the dispense rate of particulate material
DE502007006897D1 (en) * 2006-10-18 2011-05-19 Siemens Ag METHOD AND DEVICE FOR IDENTIFYING A DELAYED CONTROL PANEL, CONTROL DEVICE AND COMPUTER PROGRAM PRODUCT
CN103713521B (en) * 2013-12-31 2017-01-11 广州市香港科大霍英东研究院 2D controller design method for interval time lag in injection modeling process

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0416468A1 (en) * 1989-09-04 1991-03-13 Kabushiki Kaisha Toshiba Air-cooled motor for use in vehicles
JPH0661811B2 (en) * 1989-11-24 1994-08-17 東芝機械株式会社 Heating temperature control device
DE4026995A1 (en) * 1990-08-25 1992-02-27 Thomson Brandt Gmbh Control circuit of fuzzy logic type - has measuring sensor for actual value coupled to differentiator and subtraction input of first summator
DE4120796A1 (en) * 1991-06-24 1993-01-07 Siemens Ag DEVICE FOR PARAMETER IDENTIFICATION OF A TRANSMISSION ROUTE
JP3021135B2 (en) * 1991-11-12 2000-03-15 三菱重工業株式会社 Film thickness control device
DE4320900C1 (en) * 1993-06-24 1994-09-29 Kloeckner Moeller Gmbh Method for temperature regulation having independent model determination of a process behaviour using the heating process and for determining the transmission behaviour of the process
DE19525066A1 (en) * 1995-07-10 1997-01-16 Buna Sow Leuna Olefinverb Gmbh Setting parameters and initial conditions for predictive controller - using parameters of regulator automatically obtained from simplified linear model
DE29513152U1 (en) * 1995-08-16 1996-09-19 Siemens Ag Device for identifying a transmission link
DE19548909A1 (en) * 1995-12-27 1997-07-03 Siemens Ag Process for controlling a delayed process with compensation and control device for carrying out the process
DE19722431A1 (en) * 1997-05-28 1998-12-03 Siemens Ag Process for controlling a delayed process with compensation and control device for carrying out the process

Also Published As

Publication number Publication date
EP1001320A1 (en) 2000-05-17
ES2202990T3 (en) 2004-04-01
DE59905989D1 (en) 2003-07-24
EP1001320B1 (en) 2003-06-18
DE19851826A1 (en) 2000-05-11

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Legal Events

Date Code Title Description
REN Ceased due to non-payment of the annual fee